<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style>
	.c1{
		text-decoration: none;
	}
	.c2{
		/* 添加下划线 */
		text-decoration: underline;
	}
	.c3{
		/* 添加删除线 */
		text-decoration: line-through;
	}
	.c4{
		/* 添加上划线 */
		text-decoration: overline;
	}
</style>
</head>
<body>
<p class="c1">无装饰</p>
<p class="c2">下划线</p>
<p class="c3">删除线</p>
<p class="c4">上划线</p>
</body>
</html>